Why We Walk … and Run … And Walk Again to Get Where We're Going

You have to get to a bus stop to catch the once-an-hour express ... or to a restaurant to meet a friend ... or to a doctor's office. You've got maybe a half a mile to cover and you're worried you'll be late. You run, then you stop and walk, then run some more.

But wait. Wouldn't it be better to run the whole way?

Not necessarily.

A new study by an assistant professor of mechanical engineering at Ohio State University tests the theory that people subconsciously mix walking and running so they get where they need to. The idea is that "people move in a manner that minimizes energy consumption," said the professor, Manoj Srinivasan.

Srinivasan asked 36 subjects to cover 400 feet (122 meters), a bit more than the length of a football field. He gave them a time to arrive at the finish line and a stopwatch. If the deadline was supertight, they ran. If they had two minutes, they walked. And if the deadline was neither too short nor too far off, they toggled between walking and running.

The takeaway: Humans successfully make the walk-run adjustment as they go along, based on their sense of how far they have to go. "It's not like they decide beforehand," Srinivasan said. (Get tips, gear recommendations, and more in our Running Guide.)

The Best Technique for "the Twilight Zone"

"The mixture of walking and running is good when you have an intermediate amount of time," he explained. "I like to call it 'the Twilight Zone,' where you have neither infinite time nor do you have to be there now."

That ability to shift modes served ancient humans well. "It's basically an evolutionary argument," Srinivasan said. A prehistoric human seeking food would want to move in a way that conserves some energy so that if food is hard to find, the hunter won't run out of gas—and will still be able to rev it up to escape predators.

The study, published on January 30 in the Journal of the Royal Society Interface, doesn't answer that question of how we make such adjustments.

Runners: Take a Break if You Need It

The mix of walking and running is also something that nonelite marathoners are familiar with. Covering 26.2 miles might take less of a toll if the runner stops running from time to time, walks a bit, then resumes a jogging pace. "You use less energy overall and also give yourself a bit of a break," Srinivasan noted. (Watch: An elite marathoner on her passion for running.)

One take-home lesson is: Runners, don't push it all the time. A walk-run mix will minimize the energy you expend.

Lesson two: If you're a parent walking with your kid, and the kid lags behind, then runs to catch up, then lags again, the child isn't necessarily trying to annoy you. Rather, the child is perhaps exhibiting an innate ability to do the walk-run transition.

Potential lesson three: The knowledge that humans naturally move in a manner that minimizes energy consumption might be helpful in designing artificial limbs that feel more natural and will help the user reduce energy consumption.

The big question for Manoj Srinivasan: Now that he has his walk-run theory, does he consciously switch between running and walking when he's trying to get somewhere? "I must admit, no," he said. "When I want to get somewhere, I just let the body do its thing." But if he's in a rush, he'll make a mad dash.

"Talk to you tomorrow," he signed off in an email to National Geographic News. "Running to get to teaching now!"

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Nightmare Ends: Passengers Leave Disabled Ship

After five days without power in the Gulf of Mexico, the Carnival Triumph cruise ship carrying more than 4,000 people arrived in Mobile, Ala., to greet a cheering crowd of friends and family members waiting to embrace their loved ones.

Passengers began to disembark the damaged ship around 10:15 p.m. CT Thursday and continued into the overnight hours. Other waiting passengers lined the decks of the ship, waving, and whistling to those on shore. "Happy V-Day" read a homemade sign made for the Valentine's Day arrival and another, more starkly: "The ship's afloat, so is the sewage."

Some still aboard chanted, "Let me off, let me off!" and "Sweet Home Alabama."

The Carnival Triumph departed Galveston, Texas, last Thursday and lost power Sunday after a fire in the engine room disabled the vessel's propulsion system and knocked out most of its power.

After power went out, passengers texted ABC News that sewage was seeping down the walls from burst plumbing pipes, carpets were wet with urine, and food was in short supply. Reports surfaced of elderly passengers running out of critical heart medicine and others on board squabbling over scarce food.

Click Here for Photos of the Stranded Ship at Sea

Passengers said many of the cabins became intolerable with the smell of raw sewage. They were forced to create makeshift beds out of lounge chairs on the ship's deck.

AP Photo/John David Mercer

Girl Disembarks Cruise Ship, Kisses the Ground Watch Video

Carnival CEO Gerry Cahill: 'I Want to Apologize' Watch Video

Carnival Cruise Ship Passengers Line Up for Food Watch Video

"We kind of camped out by our lifeboat. We would have nightmares about Titanic basically happening," passenger Kendall Jenkins told ABC News Radio after disembarking from the ship.

"I am just so blessed to be back home," she added.

Jenkins was one of many passengers that were photographed kissing the ground when they exited the ship.

WATCH: Carnival CEO Gerry Cahill Apologizes to Passengers

Approximately 100 buses were waiting to take passengers on the next stage of their journey. Passengers have the option to take a bus ride to New Orleans or Galveston, Texas, where the ill-fated ship's voyage began. From there, passengers will take flights home, which Carnival said they would pay for.

Inside the buses, Carnival handed out bags of food that included French fries, chicken nuggets, honey mustard barbecue sauce and apples.

Deborah Knight, 56, decided to stay in Mobile after the arduous journey was over rather than board a bus for a long ride. Her husband Seth drove in from Houston and they checked in at a downtown Mobile hotel.

"I want a hot shower and a daggum Whataburger," said Knight.

She said she was afraid to eat the food on board and had gotten sick while on the ship.

Cruise Ship Newlyweds Won't Be Spending Honeymoon on a Boat

For 24-year-old Brittany Ferguson of Texas, not knowing how long passengers had to endure their time aboard was the worst part.

"I'm feeling awesome just to see land and buildings," Ferguson said, who was in a white robe given to her aboard. "The scariest part was just not knowing when we'd get back," she told The Associated Press.

Carnival president and CEO Gerry Cahill praised the ship's crew and told reporters that he was headed on board to apologize directly to its passengers shortly before the Carnival Triumph arrived in Mobile.

"I know the conditions on board were very poor," Cahill said Thursday night. "I know it was very difficult, and I want to apologize again for subjecting our guests for that. ... Clearly, we failed in this particular case."

Luckily no one was hurt in the fire they triggered the power outage, but many passengers aboard the 900 foot colossus said they smelled smoke and were living in fear.

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Postmaster takes case for five-day mail delivery to skeptical senators

Postmaster General Patrick R. Donahoe took his controversial plan for five-day mail delivery before a congressional hearing Wednesday, where he told senators that the Postal Service “needs your help.”

Donahoe’s refrain was familiar.

●The U.S. Postal Service (USPS) is losing $25 million a day.

●Last year, the Postal Service lost $15.9 billion.

●It defaulted on $11.1 billion owed to the Treasury.

As he has before, Donahoe pleaded with Congress, this time the Senate Homeland Security and Governmental Affairs Committee, to approve comprehensive postal reform legislation. Now, more than before, it looks as though Congress will do so.

Rep. Elijah E. Cummings (Md.), the ranking Democrat on the House Committee on Oversight and Government Reform, told the Senate panel that after two months of negotiations, “we are close, very close” to agreement on a bipartisan, bicameral bill.

Without some assistance from Congress, said Sen. Tom Carper (D-Del.), chairman of the Senate committee, “the Postal Service will drift toward insolvency and, eventually, the point at which it must shut its doors. . . . We have never been closer to losing the Postal Service.”

Although in some ways Donahoe’s appearance echoed his many other pleas for congressional action, this hearing drew a standing-room-only crowd on the third floor of the Dirksen Senate Office Building. That was probably influenced by all the attention generated by his surprise announcement last week that Saturday mail delivery will end in August.

Donahoe’s written testimony outlined several key legislative goals, but five-day mail delivery was not specifically listed among them. After repeatedly urging Congress to end the six-day requirement, Donahoe said postal officials had determined that he could take that action without congressional approval.

Moving to five-day delivery would close just 10 percent of the postal budget gap, Donahoe said, yet the controversy surrounding it stole the focus from other important financial issues.

Among them is a controversial proposal to move postal employees from the Federal Employees Health Benefits Program, which serves all federal workers, to a health insurance program run by the USPS.

Donahoe presented an updated health insurance proposal, but it received little attention compared with his five-day delivery plan.

Last year the Senate approved legislation, co-sponsored by Carper, that would allow five-day delivery two years after its enactment. The delay was designed to allow the Postal Service to study the impact of five-day delivery. Carper was among those who have expressed disappointment with Donahoe’s plan to implement it unilaterally.

“We are taking every reasonable and responsible step in our power to strengthen our finances immediately,” Donahoe told the committee. “We would urge Congress to eliminate any impediments to our new delivery schedule.

“Although discussion about our delivery schedule gets a lot of attention, it is just one important part of a larger strategy to close our budgetary gap,” he added. “It accounts for $2 billion in cost reductions while we are seeking to fill a $20 billion budget gap.”

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Ex-CNB chief found not guilty of corruption

SINGAPORE: Former Central Narcotics Bureau (CNB) chief Ng Boon Gay is not guilty of corruption in a high-profile sex-for-contracts trial.

The verdict was handed down by District Judge Siva Shanmugam on Thursday afternoon.

The judge said there was no corrupt element involved, and found Cecilia Sue's credibility to be successfully impeached.

He said her explanations on inconsistencies in her statements to the Corrupt Practices Investigation Bureau (CPIB) and evidence in court were inadequate and unconvincing.

The judge also found Ng's evidence to be consistent and credible.

Ng, 46, was charged in June last year with four counts of obtaining sexual favours from Ms Sue, who was a sales manager for two IT vendors.

Ng allegedly breached the Prevention of Corruption Act by engaging in sexual acts with Ms Sue on four occasions, between June and December in 2011.

Ms Sue, 36, was the sales manager of Hitachi Data Systems from June to November 2011.

She joined Oracle Corporation Singapore in December in 2011 as its senior sales manager.

In exchange, Ng was accused of furthering the business interests of the two IT companies in their dealings with CNB.

After a closely-watched 14-day trial, both the prosecution and defence made their closing arguments on 28 January 2013.

- CNA/xq

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One Billion rising up in the cause of women's safety

NEW DELHI: People from all walks of life will come together today to pledge their commitment to put an end to violence against women. A series of cultural events have been planned across the country as part of the global campaign which is being called 'One Billion Rising'.

The campaign was started by playwright and activist Eve Ensler (known for her play The Vagina Monologues) against all forms of "sexual abuse". The word "billion", say the organizers, refers to the one billion women who are survivors of abuse.

Women organisations, elected representatives, legal luminaries, actors, artists, NGOs and academic institutions apart from individuals are expected to participate in the day-long programme, its organisers said. The campaign will simultaneously be held in 200 other countries.

In New Delhi, its highlight will be a cultural event at Parliament Street between 5 and 8 PM, which will feature a play followed by song and dance performances by students of Lady Shri Ram College, Miranda House and Kamala Nehru College.

"We thank Delhi Metro for joining OBR campaign to make Delhi a safe, gender-friendly and inclusive city," Anjlee Agarwal, executive director of Samarthayam, an organization working for the rights of the differently-abled, said.

South Asia Coordinator of the OBR campaign Kamla Bhasin said, "We are launching Indian women`s and girl`s freedom struggle tomorrow and we are going to question every patriarchal establishment including ourselves. We seek freedom from patriarchy and freedom from violent masculinity.

(Inputs from PTI)

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Are Honeybees Losing Their Way?

A single honeybee visits hundreds, sometimes thousands, of flowers a day in search of nectar and pollen. Then it must find its way back to the hive, navigating distances up to five miles (eight kilometers), and perform a "waggle dance" to tell the other bees where the flowers are.

A new study shows that long-term exposure to a combination of certain pesticides might impair the bee's ability to carry out its pollen mission.

"Any impairment in their ability to do this could have a strong effect on their survival," said Geraldine Wright, a neuroscientist at Newcastle University in England and co-author of a new study posted online February 7, 2013, in the Journal of Experimental Biology.

Wright's study adds to the growing body of research that shows that the honeybee's ability to thrive is being threatened. Scientists are still researching how pesticides may be contributing to colony collapse disorder (CCD), a rapid die-off seen in millions of honeybees throughout the world since 2006.

"Pesticides are very likely to be involved in CCD and also in the loss of other types of pollinators," Wright said. (See the diversity of pollinating creatures in a photo gallery from National Geographic magazine.)

Bees depend on what's called "scent memory" to find flowers teeming with nectar and pollen. Their ability to rapidly learn, remember, and communicate with each other has made them highly efficient foragers, using the waggle dance to educate others about the site of the food source.

Watch as National Geographic explains the waggle dance.

Their pollination of plants is responsible for the existence of nearly a third of the food we eat and has a similar impact on wildlife food supplies.

Previous studies have shown certain types of pesticides affect a bee's learning and memory. Wright's team wanted to investigate if the combination of different pesticides had an even greater effect on the learning and memory of honeybees.

"Honeybees learn to associate floral colors and scents with the quality of food rewards," Wright explained. "The pesticides affect the neurons involved in these behaviors. These [affected] bees are likely to have difficulty communicating with other members of the colony."

The experiment used a classic procedure with a daunting name: olfactory conditioning of the proboscis extension reflex. In layman's terms, the bee sticks out its tongue in response to odor and food rewards.

For the experiment, bees were collected from the colony entrance, placed in glass vials, and then transferred into plastic sandwich boxes. For three days the bees were fed a sucrose solution laced with sublethal doses of pesticides. The team measured short-term and long-term memory at 10-minute and 24-hour intervals respectively. (Watch of a video of a similar type of bee experiment.)

This study is the first to show that when pesticides are combined, the impact on bees is far worse than exposure to just one pesticide. "This is particularly important because one of the pesticides we used, coumaphos, is a 'medicine' used to treat Varroa mites [pests that have been implicated in CCD] in honeybee colonies throughout the world," Wright said.

The pesticide, in addition to killing the mites, might also be making honeybees more vulnerable to poisoning and effects from other pesticides.

Stephen Buchmann of the Pollinator Partnership, who was not part of Wright's study, underscored how critical pollinators are for the world. "The main threat to pollinators is habitat destruction and alteration. We're rapidly losing pollinator habitats, natural areas, and food—producing agricultural lands that are essential for our survival and well being. Along with habitat destruction, insecticides weaken pollinators and other beneficial insects."

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Dorner Not IDed, But Manhunt Considered Over

Though they have not yet identified burned remains found at the scene of Tuesday's fiery, armed standoff, San Bernardino, Calif., officials consider the manhunt over for Christopher Dorner, the fugitive ex-cop accused of going on a killing spree.

"The events that occurred yesterday in the Big Bear area brought to close an extensive manhunt," San Bernardino County Sheriff John McMahon told reporters this evening.

"I cannot absolutely, positively confirm it was him," he added.

However, he noted the physical description of the suspect authorities pursued to a cabin at the standoff scene, as well as the suspect's behavior during the chase and standoff, matched Dorner, 33.

The charred remains of the body believed to be Dorner were removed from the cabin high in the San Bernardino Mountains near Big Bear, Calif., the apparent site of Dorner's last stand. Cornered inside the mountain cabin Tuesday, the suspect shot at cops, killing one deputy and wounding another, before the building was consumed by flames.

"We did not intentionally burn down that cabin to get Mr. Dorner out," McMahon said tonight, though he noted pyrotechnic canisters known as "burners" were fired into the cabin during a tear gas assault in an effort to flush out Dorner. The canisters generate high temperatures, he added.

The deputies wounded in the firefight were airlifted to a nearby hospital, where one died, police said.

Christopher Dorner Believed Dead After Shootout with Police Watch Video

Carjacking Victim Says Christopher Dorner Was Dressed for Damage Watch Video

Christopher Dorner Manhunt: Inside the Shootout Watch Video

The deceased deputy was identified tonight as Det. Jeremiah MacKay, 35, a 15-year veteran and the father of two children -- a daughter, 7, and son, 4 months old.

"Our department is grieving from this event," McMahon said. "It is a terrible deal for all of us."

The Associated Press quoted MacKay on the Dorner dragnet Tuesday, noting that he had been on patrol since 5 a.m. Saturday.

"This one you just never know if the guy's going to pop out, or where he's going to pop out," MacKay said. "We're hoping this comes to a close without more casualties. The best thing would be for him to give up."

The wounded deputy, identified as Alex Collins, was undergoing multiple surgeries for his wounds at a hospital, McMahon said, but was expected to make a full recovery.

Before the final standoff, Dorner was apparently holed up in a snow-covered cabin in the California mountains just steps from where police had set up a command post and held press conferences during a five-day manhunt.

The manhunt for Dorner, one of the biggest in recent memory, led police to follow clues across the West and into Mexico, but it ended just miles from where Dorner's trail went cold last week.

Residents of the area were relieved today that after a week of heightened police presence and fear that Dorner was likely dead.

"I'm glad no one else can get hurt and they caught him. I'm happy they caught the bad guy," said Ashley King, a waitress in the nearby town of Angelus Oaks, Calif.

Hundreds of cops scoured the mountains near Big Bear, a resort area in Southern California, since last Thursday using bloodhounds and thermal-imaging technology mounted to helicopters, in the search for Dorner. The former police officer and Navy marksman was suspected to be the person who killed a cop and cop's daughter and issued a "manifesto" declaring he was bent on revenge and pledging to kill dozens of LAPD cops and their family members.

But it now appears that Dorner never left the area, and may have hid out in an unoccupied cabin just steps from where cops had set up a command center.

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Obama urges a move away from narrow focus on politics of austerity

Just about every argument in Washington since the 2010 midterm elections, which returned control of the House to Republicans, has centered on reducing the federal deficit. On Tuesday night, President Obama leaned into his second term by declaring that a single-minded focus on deficit reduction would jeopardize the nation’s future. And he sounded an urgent call to rebuild.

Reelected by an ascendent coalition, the president spoke from a position of strength in his fourth State of the Union address. The economy is improving. The Republican Party is in disarray. The time has come, Obama indicated, to pivot away from the politics of austerity.

“Most of us agree that a plan to reduce the deficit must be part of the agenda,” he said. “But let’s be clear: Deficit reduction alone is not an economic plan. A growing economy that creates good middle-class jobs — that must be the North Star that guides our efforts.”

The president rejected the fiscal brinkmanship that defined the past two years. Instead, he framed future fiscal debates as opportunities to shape a “smarter government” — one with new investments in science and innovation, with a rising minimum wage, with tax reform that eliminates loopholes and deductions for what the president labeled “the well-off and well-connected.”

Second-term presidents have a narrow window of time to enact significant change before they become lame ducks, and Obama, while echoing campaign themes of reinforcing the middle class, made an urgent case for a more pragmatic version of populism, one that emphasizes economic prosperity as the cornerstone of a fair society.

Over and over, he noted that the time to rebuild is now.

The “Fix-It-First” program that Obama outlined to put people to work on “urgent repairs,” such as structurally deficient bridges, bore echoes of President Bill Clinton’s call in his 1999 State of the Union address to “save Social Security first.” Clinton’s was an effective line, one that stopped — at least until President George W. Bush took office two years later — a Republican drive to use the budget surplus to cut taxes.

Although Obama’s speech lacked the conciliatory notes of some of his earlier State of the Union addresses, he did make overtures to Republicans and cited Mitt Romney, his presidential challenger, by name.

He combined tough talk about securing the border, which brought Republicans to their feet, with a pledge to entertain reasonable reforms to Medicare, the federal entitlement program that fellow Democrats are fighting to protect.

“Those of us who care deeply about programs like Medicare must embrace the need for modest reforms,” he said.

Obama also pledged to cut U.S. dependence on energy imports by expanding oil and gas development. And he singled out one area where he and Romney found agreement in last year’s campaign: linking increases in the minimum wage to the cost of living.

Obama set a bipartisan tone at the start of his speech, quoting from President John F. Kennedy’s address to Congress 51 years earlier when he said, “The Constitution makes us not rivals for power, but partners for progress.”

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Cambodia reports sixth bird flu death this year

PHNOM PENH: A three-year-old Cambodian girl has died from bird flu, bringing the country's toll from the deadly virus to six so far this year, the World Health Organisation said on Wednesday.

The girl, from the southern province of Kampot, died in a children's hospital in the capital Phnom Penh, the WHO said in a joint statement with the Cambodian health ministry.

Tests confirmed she had contracted the H5N1 strain of avian influenza and "the girl had a history of coming into contact with poultry (in her village) prior to becoming sick", it added.

Cambodian Health Minister Mam Bunheng said in the statement that "H5N1 remains a serious threat to the health of Cambodians, especially children".

The country has recorded 28 cases of H5N1 since 2003, with all but three of them proving fatal.

Four Cambodians, including a 17-month-old girl, died from the strain last month and a five-year-old girl died last week.

The virus has killed more than 365 people worldwide since a major outbreak in 2003, according to WHO statistics.

It typically spreads from birds to humans through direct contact. But experts fear it could mutate into a form easily transmissible between humans, with the potential to trigger a pandemic.

- AFP/al

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Kerala rape case: Kurien's wife rubbishes charge against husband

PATHANMTHITTA, KERALA: Amid growing clamour for resignation of Rajya Sabha Deputy Chairman P J Kurien in the Suryanelli gangrape case, his wife has rubbished the allegations against him and said those hurling "malicious charges" never bothered to appreciate sentiments of her family.

Susan Kurien, a retired high school teacher, said in a statement here that her husband had reached home and they had supper together on the day he was alleged to have abused the victim in a guest house at distant Kumali.

"I am sure that the allegations against my husband are baseless. Myself and my two daughters firmly believe that the truth prevail in this matter," Susan said.

She said her family was deeply pained that Kurien was being haunted through media (by those levelling charges) after a span of 17 years, raising the same allegations which were found baseless by repeated investigations and judicial scrutiny.

"Those who are fighting for women's right should not forget the fact that Prof Kurien too has a family", she said.

Kurien has all along rejected the charge and opposition's demand for his resignation, saying it was a matter which had already been cleared by the Supreme Court.

The girl from Suryanelli in Idukki district was abducted in January 1996 and transported from place to place across Kerala and sexually exploited by different persons.

The victim had sent a letter to the Supreme Court last week, seeking a review of the apex court's order quashing all charges against Kurien.

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